Seems like something that just needs to be 100% open source, with designs freely available to the public. If it works so well, it really ought to be utterly fr

Seems like something that just needs to be 100% open source, with designs freely available to the public. If it works so well, it really ought to be utterly free to construct, since it will have such a significant impact on peoples lives to be able to have such access to fresh water. So whats the problem here? Isn't this science free, already?